Loperamide is a medication used to slow and stop diarrhea. It inhibits nervous signalling to the large intestine, relaxing the smooth muscles within the intestinal wall and preventing intestinal contents from moving forward. The large peristaltic waves inhibited by loperamide are________.
Fill in the blank(s) with the appropriate word(s).
mass movements
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Ion and water regulation in the insect is controlled by the
A) Kidney. B) Metanephridium. C) Malpighian tubule. D) Caecum.
Natural analgesia occurs
a. when endogenous opiates bind to P-substance. b. when endogenous opiates bind to receptors on afferent pain fibers. c. when acute pain fibers are activated d. both (a) and (b) above. e. both (b) and (c) above.
Which of the following would be an example of chemotaxis?
A. A white blood cell can move into and out of blood vessels. B. Platelets are attracted to the rough surface of damaged blood vessels. C. Red blood cells move due to pressure gradients generated by the heart. D. A white blood cell moves toward an injury site due to the release of certain chemicals by injured cells.
List the four types of general sensory receptors based on function, and identify the type of stimulus that excites each type
A) nociceptors (temperature), thermoreceptors (pain), mechanoreceptors (physical distortion), and chemoreceptors (chemicals dissolved in body fluids) B) nociceptors (chemicals dissolved in body fluids), thermoreceptors (physical distortion), mechanoreceptors (pain), and chemoreceptors (temperature) C) nociceptors (physical distortion), thermoreceptors (chemicals dissolved in body fluids), mechanoreceptors (pain), and chemoreceptors (temperature) D) nociceptors (temperature), thermoreceptors (physical distortion), mechanoreceptors (temperature), and chemoreceptors (pain) E) nociceptors (pain), thermoreceptors (temperature), mechanoreceptors (physical distortion), and chemoreceptors (chemicals dissolved in body fluids)